The inflammation, irritation, and/or the swelling of the vagina, usually as a direct result of vigorous coitus, otherwise known as "taking a pounding".

"Did you hear about Mary's new african american boyfriend Tron?"
"No, but i don't think the community would approve............."
"Yes i know... I've been talking to her and apparently she's been suffering through some substantial cuntcussions recently. The doctor told her to stay away from physical activity for two weeks"